package com.sky.service.impl;


import com.sky.constant.StatusConstant;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.vo.OrderReportVO;
import com.sky.vo.SalesTop10ReportVO;
import com.sky.vo.TurnoverReportVO;
import com.sky.vo.UserReportVO;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    /**
     * 统计区间内的营业额
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)){
            //日期计算，计算指定日期的后一天日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的营业额
        List<Double> turnoverList=new ArrayList<>();


        for (LocalDate date : dateList) {
            //查询日期对应的营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);

            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);

            Double  turnover=orderMapper.sumByMap(map);
            turnover=turnover==null?0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 统计区间内的用户数据
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        //存放开始到结束时间每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //存放新增用户数量
        List<Integer> newUserList=new ArrayList<>();
        //存放总用户数量
        List<Integer> totalUserList=new ArrayList<>();



        for (LocalDate date : dateList) {
            //查询日期对应的用户数量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);

            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("end",endTime);
            //总的用户数量
            Integer totalUser=userMapper.countMap(map);

            map.put("begin",beginTime);
            //新增的用户数量
            Integer newUser=userMapper.countMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }





        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 统计区间内的订单数据
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放开始到结束时间每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);


        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天订单总数数量
        List<Integer> orderCountList=new ArrayList<>();
        //存放每天有效订单数量
        List<Integer> validOrderCountList=new ArrayList<>();


        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount = getOrderCount(beginTime, endTime, null);


            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        //计算时间区间内的有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        //计算订单完成率
        Double orderCompletionRate =0.0;
        if(totalOrderCount!=0){
            orderCompletionRate= validOrderCount.doubleValue() / totalOrderCount;
        }



        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }



    /**
     * 根据订单条件查询订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    public Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status){
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return userMapper.countMap(map);

    }

    /**
     * 统计区间内的销量排名前10的菜品
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);


        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        String numberList = StringUtils.join(numbers, ",");

        //封装返回结果数据
        return SalesTop10ReportVO
                .builder()
                .numberList(numberList)
                .nameList(nameList)
                .build();
    }
}
